Extension set for a receiver, particularly a dvb-t-receiver

ABSTRACT

The invention relates to an improved extension device for a DVB-T-receiver characterised in that it comprises an indoor-repeater ( 9 ) enabling the received and for digitised signals supplied to be emitted or are emitted in a non-converted manner via an antenna device ( 13 ) associated with the repeater ( 9 ) or arranged in the repeater ( 9 ) or connected thereto.

[0001] The invention relates to an extension set for a receiver, in particular a DVB-T receiver according to the preamble of claim 1.

[0002] As is known, a DVB-T receiver is a receiver or a DVBT digital television (IDTV) for receiving terrestrially broadcast digitized television programmes (D=digital, V=video, B=broadcasting, T=terrestrial).

[0003] Even with devices such as these, it is by no means ruled out that reception at the desired installation location of the receiver may possibly be poorer than elsewhere in the room.

[0004] Therefore, it has already been proposed in accordance with DE 299 14 048.2 to provide an extension set particularly for a DVB-T receiver for receiving terrestrially broadcast digitized television programmes, which comprises an antenna pedestal device provided with an antenna connection cable. This extension set can be connected to a conventional DVB-T receiver, in which case an antenna plugged onto the receiver can then be withdrawn from the latter and connected to the extension set. It is thus not necessary to purchase a new antenna. This enables a flexible arrangement of the antenna pedestal device, primarily at a different installation location than that at which the DVB-T receiver is situated. Particularly when the DVB-T receiver is situated at a less suitable location with regard to reception the prior art forming the generic type opens up the possibility of installing the antenna at a more suitable location.

[0005] It is an object of the present invention, proceeding from this prior art forming the generic type, to provide a further improvement which permits a DVB-T receiver to be used as optimally as possible.

[0006] The object is achieved according to the invention in accordance with the features specified in claim 1. Advantageous refinements of the invention are specified in the subclaims.

[0007] The present invention makes use of the insight that the modulation method OFDM employed in the DVB-T receiver is capable of multipath propagation. This permits provision of an active or passive indoor repeater. The latter may preferably be connected as a plug-on module to an antenna socket. Only in the case of an active indoor repeater does the latter generally also have a power supply connection not provided—which would be the exception—with a rechargeable electrical store (accumulator).

[0008] Furthermore, the indoor repeater according to the invention could, however, also be connected directly to a coaxial cable which is provided from the conventional reception antenna—situated at a suitable location—for DVB-T receivers.

[0009] Finally, the indoor repeater could even be arranged in a manner concealed beneath a surface.

[0010] The repeater according to the invention is independent of terminal equipment since the signals are not converted. Rather, it serves as a purely passive or active (that is to say amplifying) device by which the signals supplied via the antenna i.e. the coaxial cable, are merely radiated again (in passive operation) or are radiated in an amplified manner (in active operation).

[0011] The invention is explained below using an exemplary embodiment.

[0012] The figure represents in plan view a room 1 in a building which, in cross section, has an L-shaped configuration, for example. A DVB-T receiver 5 for example for receiving terrestrially broadcast digitized programmes is installed at a location 3 in the room in plan view. Said receiver is provided with a dedicated antenna 7 suitable for receiving the terrestrially digitized programmes.

[0013] If the reception quality at the installation location is not optimal on account of specific conditions, then reception can be improved by using a repeater 9 according to the invention.

[0014] The repeater 9 is connected to a coaxial connection socket 11, for example. It has a dedicated, if appropriate integrated, antenna 13. In the exemplary embodiment shown, said repeater 9 is configured as an active repeater which is connected to an electrical power supply connection socket 17 via a dedicated power supply connection cable 15.

[0015] Said repeater contains, via a coaxial cable 19 connected to the connection socket 11, the digitized programmes received terrestrially via an external antenna system (not specifically illustrated), amplifies said programmes and emits them again via the dedicated integrated antenna 13. As a result, the reception quality is significantly improved at the installation location of the receiver.

[0016] The repeater 19 may equally well also be designed as a passive device. It may also or additionally be electrically connected directly to a coaxial cable (that is to say not via a connection socket as interface). In this case, it may even be accommodated in a flush concealed socket or chamber. 

1. An extension apparatus for a DVD-T receiver, characterized by an indoor repeater (9), by means of which the received and/or supplied digitized signals can be radiated or are radiated in a non-converted manner via the antenna device (13) which is provided in the repeater (9) or is assigned to the repeater (9) or can be connected thereto.
 2. The extension apparatus as claimed in claim 1, characterized in that the repeater (9) operates passively.
 3. The extension apparatus as claimed in claim 1, characterized in that the repeater (9) operates actively with generation of amplified radiation.
 4. The extension apparatus as claimed in one of claims 1 to 3, characterized in that the repeater (9) can be connected to a coaxial interface, in particular an antenna connection socket (11).
 5. The extension apparatus as claimed in one of claims 1 to 3, characterized in that the repeater (9) can be connected or is connected directly to an antenna connection cable, in particular to a coaxial cable.
 6. The extension apparatus as claimed in one of claims 1 to 5, characterized in that the repeater (9) can be accommodated or arranged in a manner concealed beneath a surface.
 7. The extension apparatus as claimed in one of claims 1 to 5, characterized in that the repeater (9) can be connected on a surface.
 8. The extension apparatus as claimed in one of claims 1 to 7, characterized in that the repeater (9) can be connected as a plug-on module, in particular to an antenna socket or as plug module to a coaxial cable on the antenna side. 